version: 3.5.0
python 3.11

I'm trying to export the same dataset several times in different file formats. I've found that specifying a formatter for a column data alters the underlying data. The issue occurs if exporting the same format too.

import tablib

dataset = tablib.Dataset()
dataset.headers = ["text"]
dataset.append(["aAbBcC"])
dataset.add_formatter("text", lambda s: s[2:])

print(dataset.export("csv"))
print(dataset.export("csv"))

Output:

text
bBcC

text
cC